HCPL-261N-500E Equivalent & Substitute Parts

Part Overview

The HCPL-261N-500E is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This device provides 3750Vrms isolation with open collector, Schottky clamped output configuration, supporting data rates up to 10MBd. The part is currently active in production with 783 units in stock. Substitute parts are necessary when addressing specific application requirements such as higher isolation voltage ratings, improved common mode transient immunity, alternative output configurations, or when managing component availability across supply chains.

Substiute Parts

HCPL-261N-500E

Broadcom LimitedIn Stock: 818HCPL-261N-500E Datasheet

Current PartRFQ

ACPL-C61L-500E

Broadcom LimitedIn Stock: 6652ACPL-C61L-500E Datasheet

MFR RecommendedRFQ

ACPL-W61L-500E

Broadcom LimitedIn Stock: 7394ACPL-W61L-500E Datasheet

MFR RecommendedRFQ

HCPL2601SD

onsemiIn Stock: 23190HCPL2601SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-261N-500E is determined by the following critical parameters:

• Number of Channels: Must equal 1
• Data Rate: Must support 10MBd or higher
• Input Type: Must be DC
• Voltage - Supply: Must be compatible with 4.5V ~ 5.5V or provide wider range
• Package Compatibility: Surface mount packages acceptable for board-level integration
• Product Status: Active or Obsolete status acceptable based on application lifecycle requirements
• Compliance: RoHS3 compliance required

The substitute parts listed below meet these criteria while offering variations in isolation voltage, common mode transient immunity, output configuration, and operating temperature range. These variations allow designers to select components optimized for specific circuit requirements without compromising core functionality.

Parameter Comparison

Engineering Selection Recommendations

ACPL-C61L-500E is recommended for applications requiring enhanced isolation voltage (5000Vrms versus 3750Vrms) and superior common mode transient immunity (20kV/µs versus 1kV/µs). This part features tri-state output configuration and supports extended operating temperature range (-40°C to 105°C). The wider supply voltage range (2.7V ~ 5.5V) provides flexibility in power supply design. Output current is reduced to 10mA per channel. Package change from 8-DIP Gull Wing to 8-SOIC requires PCB layout modification. Active product status ensures long-term availability.

ACPL-W61L-500E is recommended for applications requiring push-pull output configuration with improved propagation delay characteristics (80ns maximum versus 100ns). This part provides 5000Vrms isolation and 20kV/µs common mode transient immunity. Extended operating temperature range and wider supply voltage compatibility match ACPL-C61L-500E specifications. Output current is 10mA per channel. Package is 6-SOIC (0.180", 4.58mm Width), requiring PCB redesign. Active product status ensures supply continuity.

HCPL2601SD is recommended only for applications where component availability from alternative suppliers is critical and where lower isolation voltage (2500Vrms) is acceptable. This part maintains open collector output configuration and 50mA output current matching the original HCPL-261N-500E. Propagation delay is improved (75ns maximum). However, product status is obsolete, indicating discontinued manufacturing. Use only when supply of active alternatives is unavailable and application requirements permit lower isolation voltage.

Frequently Asked Questions (FAQ)

Q: Can ACPL-C61L-500E directly replace HCPL-261N-500E without circuit modification?

A: Direct pin-for-pin replacement is not possible. ACPL-C61L-500E uses 8-SOIC package versus 8-DIP Gull Wing for HCPL-261N-500E. Output configuration differs (tri-state versus open collector, Schottky clamped), requiring output circuit redesign. Supply voltage range is wider (2.7V ~ 5.5V), which is compatible with 4.5V ~ 5.5V applications. PCB layout and schematic modifications are necessary.

Q: What is the primary advantage of ACPL-W61L-500E over HCPL-261N-500E?

A: ACPL-W61L-500E provides push-pull output configuration with faster propagation delay (80ns maximum versus 100ns), higher isolation voltage (5000Vrms versus 3750Vrms), and superior common mode transient immunity (20kV/µs versus 1kV/µs). Extended operating temperature range (-40°C to 105°C) supports wider environmental conditions. Trade-off is reduced output current (10mA versus 50mA) and package change to 6-SOIC.

Q: Is HCPL2601SD suitable for new designs?

A: HCPL2601SD is marked as obsolete and should not be selected for new designs. Use only when addressing legacy system maintenance or when active alternatives are unavailable. For new designs, select ACPL-C61L-500E or ACPL-W61L-500E to ensure long-term component availability and manufacturing support.

Q: What are the key differences in output current capability?

A: HCPL-261N-500E and HCPL2601SD both provide 50mA output current per channel. ACPL-C61L-500E and ACPL-W61L-500E provide 10mA output current per channel. Applications requiring higher output current must retain HCPL-261N-500E or HCPL2601SD, or implement external driver stages with lower-current optoisolator outputs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. HCPL-261N-500E, ACPL-C61L-500E, ACPL-W61L-500E, and HCPL2601SD are all ROHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: What supply voltage considerations apply when substituting parts?

A: HCPL-261N-500E requires 4.5V ~ 5.5V supply. ACPL-C61L-500E and ACPL-W61L-500E accept 2.7V ~ 5.5V supply, providing wider compatibility with low-voltage systems. HCPL2601SD requires 4.5V ~ 5.5V matching the original part. Verify power supply design compatibility before selecting substitute parts.